In answer to your straw poll question, as someone who has used pXRF and has a high degree of confidence in the accuracy of pXRF results provided the two following caveats are met: its in homogenized RC chips and also provided its for an element that can reliably and accurately be detected with pXRF without interference signals from elements with similar chemical/electron shell states - then yes the ASX has made a complete cock-up of their conflicting requirements of timeliness and transparency and accuracy.
The ASX is supposed to have industry experts in-house, and they would surely tell ASX management about the limits of what pXRF can and cannot do, it would take someone 5 minutes to look at pXRF results with the type of drill sample and reported elements (and the instrument detection limits if applicable) on a case by case basis.
I expect what has happened here is the compliance and legal people in charge of the ASX with no scientific training are unable to or unwilling to listen to the advice of industry experts within the ASX. They should all be made to take pXRF training to see the limitations and accuracy of the industry-accepted instruments, rather than cling on to their outdated ideas. The industry accepts these instruments with precision and accuracy enough to make exploration decisions and sometimes even grade control decisions. They are not cheap and require specialized training and have limited battery lives and operating temperatures that can sometimes be exceeded on a drill site but they have improved a lot over the years. Its not like they were invented yesterday, and the ASX has no excuse not to be completely on top of this issue rather than flailing about.
At the moment as you say @2ic we are in a laughable situation where some companies are slapped across the wrist for reporting preliminary pXRF results that turn out to be within +/5% of the lab assay results, and then other days where another part of the ASX tells companies not to release preliminary pXRF and then complain when news leaks out from the drill site and shares go in inexplicable runs in the days before an announcement or assays are released.
Like you - my natural preference is for transparency and all getting access to market-sensitive information at the same time so that requires the ASX to get their s%$t together and act like a grown-up regulator.
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